Ford Repair: Engine Modifications, double pumper, comp cams

Question
I have an 82 mustang with the 5.0 and a four speed transmission.  The engine is mostly stock except for an Edelbrock Performer 289 intake and a Holley 600 cfm. double pumper which I just intstalled recently.  I am looking to try and push the horsepower to around 200 or better but I am limited to sticking with the factory heads. (financially)  Is there a good camshaft out there that I can use without having to change out the whole valvetrain?  I'm not real sure where I stand in the horsepower department right now with just the intake and carb.  I know that it is rated at about 160 with the factory setup.  Also, should I change my timing now that I am running a bigger intake and carb? If so what should it be at?  Any help would be greatly appreciated.

Mike

Answer
Mike-

  A cam won't do much without heads, but it will help a little.  If you want to avoid refreshing the valvetrain, I would go with a mild cam from Comp Cams' Dual Energy or Magnum line.  I'm a big fan of their Xtreme Energy line, but they use more aggressive opening paterns making it a good idea to freshen up the valvetrain.  As for the timing, you can change it, but you don't have to.  I wouldn't advance it to any farther than 14 degrees initial timing.  That would pretty much marry you to 93 octane gas though, so that's something else to consider.  Hope this helps.

Steve